<div class="example" [ngClass]="loading1&&loading2?'hide':'show'">
  <nz-spin nzSimple [nzSize]="'large'"></nz-spin>
</div>
<div [ngClass]="loading1&&loading2?'show':'hide'">
  <h1>管理员主页</h1>
  <nz-divider></nz-divider>
  <div>
    <div nz-row>
      <div nz-col nzSpan="6">
        <div class="chart" id="user_chart"></div>
      </div>
      <div nz-col nzSpan="6">
        <div class="chart" id="book_chart"></div>
      </div>
      <div nz-col nzSpan="6">
        <div class="chart" id="user_book_chart"></div>
      </div>
      <div nz-col nzSpan="6"></div>
    </div>
  </div>
</div>
